The construction sheet at
www.pref.chiba.lg.jp
is hard to read, but from what I guess, the ratio of the flag is 2:3 and the height
of the emblem is 3/5th of the flag's hoist. The background is a sky blue color,
edges are yellowish and center is white.Zachary Harden, 10 September 2009

The prefecture emblem was adopted on Dec 28th 1909 by Notice No 378. The
prefecture flag was adopted on Jul 29th 1963 by Notice No 328-2.Nozomi Kariyasu, 23 March 2015